Step 1: Proofread the micrometer and reset to zero.
Step 2: Measure the outside diameter of the workplece.
Step 3: Freeze the workplece in the cryogenic cabinet.
Step 4: The freezinf temperarture was set at -100 degrees and the experiment started at 10:45. it reachs the setting temperature at 11:36, takes 51 minutes and holds for 2 hours.
Step 5: Remove morkpleces (protect against frostbite).
Step 6: Measure the outside diameter of the workplece after thermal contraction. It was 25.119 mm befire freezing and 24.913 mm after freezing, contraction for 206 um.
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温度制御範囲:-150℃~+50
温度制御範囲:-120°C~+350°C
温度制御範囲:-40℃~+100
温度制御範囲:-85℃~+250
温度制御範囲:-150℃~-10